Discontinued 32-bit Arduino-compatible board based on the ATSAMD21G18 ARM Cortex-M0 running at 48 MHz, 3.3 V logic, with 14 digital pins, 6 analog inputs (12-bit ADC), and 1 analog output (10-bit DAC). Not 5 V tolerant; logic level must be matched to shields.
| Pin | Type |
|---|---|
| Digital pins (14) | Signal |
| Analog inputs (6, 12-bit ADC) | Signal |
| Analog output (10-bit DAC) | Signal |
| Power: 3.3V, USB, etc. | Power |
About 75 boards across every Arduino generation: 5V Uno/Mega/GIGA, 3.3V MKR and Portenta, plus DFRduino and Bluno compatibles. Confirm the voltage rail before stacking any shield.
10 I/Os PLC Module - CPU Arduino Nano (Optoisolated Output) visual preview10 I/Os PLC Module - CPU Arduino Nano (Optoisolated Output)
10 I/Os Relay Module - CPU Arduino Nano (Relay Output) visual preview10 I/Os Relay Module - CPU Arduino Nano (Relay Output)
Adafruit METRO 328 - Arduino Compatible - with Headers visual previewAdafruit METRO 328 - Arduino Compatible - with Headers
Adafruit Metro Mini 328 V2 - Arduino-Compatible - 5V 16MHz [STEMMA QT / Qwiic] visual previewAdafruit Metro Mini 328 V2 - Arduino-Compatible - 5V 16MHz [STEMMA QT / Qwiic]
Arduino DUE Microcontroller Board visual previewArduino DUE Microcontroller Board
Arduino Duemilanove 328 visual previewArduino Duemilanove 328
Arduino Esplora visual previewArduino Esplora
Arduino GIGA R1 WiFi visual previewArduino GIGA R1 WiFi
Arduino Leonardo visual previewArduino Leonardo
Arduino Leonardo ETH visual previewArduino Leonardo ETH
Arduino M0 Pro visual previewArduino M0 Pro
Arduino Mega (DFR0083) visual previewArduino Mega (DFR0083)
10 I/Os Relay Module - CPU ESP32 (Relay Output) visual previewWi-Fi and Bluetooth on a single chip, in every shape from Espressif DevKitC to Adafruit Feathers with STEMMA QT, DFRobot FireBeetles tuned for battery life, and Seeed XIAOs under a thumbnail.
Boards · ESP32 boards · 156 parts
15x7 CharliePlex LED Matrix FeatherWing - Cool White visual previewAbout 270 add-ons across Pi HATs, Arduino shields, and FeatherWings. The same function — motor control, PoE, display — usually ships once per host connector family. Get the host board right first.
Boards · HATs, Shields & add-ons · 270 parts
16-Ch Servo Driver Breakout for micro:bit, I2C visual previewSpecialists: Teensy for high-clock audio and USB, Adafruit SAMD boards running CircuitPython or the Arduino IDE, proper STM32 eval kits, and the micro:bit classroom ecosystem. Schematik builds target ESP32, Arduino Uno, and Pico; come here when you have a specific reason to.
Boards · Other MCU boards · 229 parts
Adafruit DVI Breakout Board for HDMI Source Devices visual previewThe Raspberry Pi MCU line — Pico, Pico 2, and third-party boards on the same silicon — plus a deep bench of Pico-pinout displays, loggers, and radio modules that do nothing without a Pico plugged in.
Boards · Pico & RP2040 boards · 43 parts